Switchboard-socket.



N0. 7|2,600. Patented Nov. 4, I902.

H. R. SARGENT. SWITCHBOARD SOCKET.

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7H5 rmims Pz'rza: co, wow-044mm. WASHIN UNITED STATES PATENT OFFICE.

HOWARD R. SARGENT, OF SCHENEOTADY, NEYV YORK, ASSIGNOR TO GENERALELECTRIC COMPANY, A CORPORATION OF NEW YORK.

SWlTCHBOARD-SOCKET.

PECIFICATION forming part of Letters Patent No. 712,600, dated November4, 1902.

. Application filed March 5, 1901. Serial No. 49,677. (No model.)

To aZZ whom it may concern.-

Be it known that I, HOWARD R. SARGl-ENT, a citizen of the United States,residing at Schenectady county of Schenectady, State of New York, haveinvented certain new and useful Improvements in Switchboard-Sockets,(Case No. 1,726,) of which the following is a specification.

This invention relates to improvements in the construction of a panel orswitchboard adapted for use in connection with plugs of the type havingan exterior threaded-sleeve contact and a central end contact. Hithertothese plugs have been screwed directly into exposed threaded conductorsmounted on the panel.

The particular object of the invention is to provide a structure wherebythe common screw-threaded socket-sleeve can be utilized in connectionwith cabinet-panels for the reception of fuse-plugs of the typedisclosed in the patent to \Virt, No. 576,710, February 9, 1897.However, it will be apparent that the structure hereinafter described isadapted also for the reception of incandescent-lamp bases of the commoncommercial form or of the Tournier standard attaching-plug.

Of the drawings, Figure 1 is a plan of a cabinet panel embodying theinvention. Fig. 2 is a vertical section of a portion of the same. Fig. 3is a plan of a circuit-terminal, and Fig. tis a plan of aninsulating-shell in an inverted position.

In Fig. 1 I represents a panel which is constructed of any suitableinsulating material. 14 and 15 are common circuit-terminals providedwith holes in their ends for the reception of leads and are secured tothe panel by screws 23 2%, by which the conductors 20 and 21 are secured.to the panel. All the other parts of the apparatus are connected to thepanel in accordance with this invention.

The numerals 1 to 8, inclusive, represent a number of fuse-plugsconstructed in accordance with the patent to \Virt above mentioned. Eachplug, as shown in Fig.2, comprises an insulating-base 1, open at one endand provided with a cap 13. A center contact 9 is mounted on the outsideof one end, and a threaded sleeve 10 surrounds the body of the plug. Thecenter contact and sleeve are connected by a fuse 11, which passes overan insulating-bridge 12.

In Fig. 1 branch circuits'lead from the conductors or terminals 20 and21 by the cross connections T There are four branch circuits shown inthis figure, and of each pair of plugs, such as 1 and 2, one isconnected in each side of one of these circuits. The branches lead frombinding-posts P, which are inserted in the terminals T. (Shown in detailin Fig. 3.)

The invention will now be understood by reference to Figs. 2, 3, and at.A shell S of insulating, material, open at its upper end for thereception of the plug, is mounted on the panel I. Looking at the bottomof this shell in Fig. el it may be seen that it is provided with anopening 0, partly at the side and partly at the bottom. This opening isfor the terminal T. (Shown in Fig. 3.) A groove D is formed in thebottom of the shell, and this groove fits the terminal T A hole Eextends through the bottom of the shell, and, as seen in Fig. 2, thethreaded bolt Q passes through this hole and a screw-threaded opening inthe terminal T to hold the parts together and make good contact with theterminal T shape of the terminal T. One end is provided with a threadedopening 0 for the reception of the binding-post P and is also providedwith lugs F to retain the branch lead U in place beneath thebinding-post. The other end of the terminal T .is ring-shaped, having acentral opening G. The bindingpost end of the terminal T is droppedthrough the hole 0 before the shell S is placed upon the panel I. Thering end then rests upon the inside of the bottom of the shell. Thethreaded-sleeve contact L, provided with the usual flange I is thenmounted on the ring, and on this flange is placed a disk M of insulatingmaterial, such as mica. A nut N is then inserted in the countersunk hole.I in the bottom of the panel, and a bolt Q, provided with a head H,serving as the center contact and having a washer W beneath it, isinserted through the disk M, the bottom of the shell S, the hole G inthe terminal T, and the panel I to engage with the nut N and lock theparts together. It will be noted that by Figs. 2 and 3 disclose thepeculiar this bolt Q the sleeve S and the terminals T and T are securedto the panel and the sleeve L, insulation M, washer W, and centercontact H are secured to the terminal T. The plug 1 can now be insertedin the shell S to engage with the threaded sleeve L as readily as in anordinary socket. I

The chief advantage of this construction is the protection by theinsulating-sleeve S of the threaded-sleeve contact L. As abovedescribed, the plug has hitherto been screwed into an exposed terminal.A further and important feature is that parts standard for va-- riousother apparatus can be utilized for this apparatus, whereby a greatsaving in cost ofproduction is obtained.

\Vhat I claim as new, and desire to secure by Letters Patent of theUnited States, is

1. The combination with a panel or switchboard, of an insulating-shellopen at the top and having an opening partly in the side and partly inthe bottom, a circuitterminal mounted on the panel, extending throughsaid opening, and resting on the inside of the bottom of the shell, athreaded contact-sleeve mounted on said terminal inside said shell, anda single bolt passing through said parts to hold them in position on thepanel orswitchboard, the head of said bolt constituting the othercontact.

2. The combination with a panel or switchboard, of an insulating-shellopen at the top and having an opening partly in the side and partly inthe bottom, a ring-terminal mounted on the inside of the bottom of theshell and extending outside the shell upon the panel, a threaded-sleevecontact mounted on said ring-terminal inside the shell, and a singlebolt passing through said parts to hold them in position on the panel orswitchboard, the head of said bolt constituting the other contact.

3. In combination witha panel or switchboard, of an insulating-shellmounted thereon, said shell being open at the top, having a centralopening through the bottom, and having a groove D on the outside surfaceof the bottom, a circuit-terminal mounted on the panel and extending insaid groove, a

nal, and through the panel, to hold the parts together upon said panelor switchboard.

5. The combination with a panel or switchboard, of an insulating-shellmounted thereon, said shell being open at the top and having an openingpartly in the side and partly in the bottom, a circuit-terminal mountedon the panel, extending through said opening, and resting on the insideof the bottom of the shell, a threaded contact-sleeve mounted on theterminal in the shell, a disk of insulating material mounted on thebottom of said sleeve, a second circuit-terminal mounted on the panelbeneath the shell, a center contact mounted on the insulating-disk, andabolt'extending from said center contact and passing through theinsulating-disk, through both circuit-terminals, but making contact onlywith the second terminal, and through the bottom of the shell, tocomplete the circuit and hold the parts together upon said panel orswitchboard.

6. The combination with a plug havinga threaded-sleeve contact and acentral end contact, of a panel or switchboard provided withcircuit-terminals, a shell of insulating material detachably mounted onthe panel, a threaded-sleeve contact mounted inside the sleeve andconnected to one panel-terminal, and a center contact mounted inside theshell and connected to the other panel-terminal.

In Witness whereof I have hereunto set my hand this 28th day ofFebruary, 1901.

HOWARD R. SARGENT. Witnesses:

BENJAMIN B. HULL, MARGARET E. WOOLLEY.

